句中，充当宾语的成分是一个句子，这个句子代替了原来用一个词表示的宾语，称之为宾语从句能用if，不能用whether 引导的宾语从句 ①if引导条件状语从句，意为“如果

语从句主要有三种类型，分别为定语从句（限定性定语从句、非限定性定语从句）、状语从句

有些句子，虽没有含条件关系的连词，却也隐含着条件关系，我们称之为含蓄条件状语从句，接下来，小编就为大家讲解一下含蓄条件状语从句的相关语法！   这些句子常用一些词，如but for, without 等引出一个介词结构来表示条件，条件应该是虚拟的，或与事实相反的假设。 例如：but for 若非，要不是 You may consider it useless, but for our customers it's an all-important sign of good service. 您句子，虽没有含条件关系的连词，却也隐含着条件关系，我们称之为含蓄条件状语从句也许会认为这样毫无用处，可是对于我们的客户而言，它却是优质服务的重要体现。 The first series was really bad. But for some reason the public took to it.  第一部系列剧糟透了，可是不知为何，观众开始喜欢上了它。 Spurs could have had several goals but for some brilliant saves from John Hallworth.  要不是约翰·霍尔沃思几次精彩的扑救，热刺队原本可以射进好几个球。   例如：without 如果没有...就不... You can't have one without the other, as the song says.  就像歌里唱的那样，两者密不可分，不能只取其一。 In a strangled voice he said, "This place is going to be unthinkable without you."  他哽咽地说道：“没有你这个地方会变得不可想象。” I tell you, Carrie, before God, I can't live without you.  我告诉你, 嘉莉, 苍天作证, 没有你我就活不下去.   例如：otherwise 否则 We didn't know his telephone number, otherwise we would have telephoned him. 我们不知道他的电话号码，否则我们就会给他打电话。 This is the one blemish on an otherwise resounding success.  如果没有这个小小的失误，这就是一次彻底的胜利。 If he had done otherwise, I should have thought him a rascal.  如果他不这样做, 我就认为他是个恶棍.   看来外国人也是有含蓄的一面的嘛，大家可以学着用哦，喜欢就收藏起来吧~

就是他的意思。 　　The problem is how we can find him. 问题是我们如何找到他。 　　另外，表语从句还可以用as if, as though, because等来引导。如： 　　It is because he is too foolish. 那是因为他太蠢了。 　　It is not as though we were poor. 又不是我们家里穷。 　　三、宾语从句 　　1. 引导词：宾语从句就是在复合句中用作宾语的从句。一般说来，可用于引导主语从句的引导词也可用于引导宾语从句，如that, what, who, which, when, where, how, why, whether等。如： 　　We believe that he is honest. 我们相信他是诚实的。 　　He asked when the train would get in. 他问火车什么时候进站。 　　He asked who lived next door. 他问谁住在隔壁。 　　She asked why he was silent. 她问他为什么一言不发。 相信同学们对名词性从句已将有了一定程从句，就是指其作用相当于名词的从句，它包括主语从句、表语从句、宾语从句和同位语从句度上的理解了，今后的学习和生活中，还有很多需要学习。收藏起来随时回顾吧~

语” 如果定语从句的时态与主句的时态具有同时性（包括谓语面的“过去分词”作后置定语的区别，此项里的being是不可以省略的，否定表示现在时、完成时和过去时的被动关系了（详见2）“过去分词”作后置定语）。 例1：The dormitory being built is for girl students. [cn]正在盖的宿舍是给女生住的。[/cn] 例2：The baby being taken care of by my mother is mine.[cn] 正在由我妈妈带的这个婴儿是我的。[/cn] “过去分词短语”作后置定语 此项要明白三点：（1）“过去分词短语”与前面的名词一定是动宾关系；（2）主句为一般现在时或一般将来时，“过去分词”所隐含的时态是“一般现在时

须用倒装结构。如： 1.Hardly/Scarcely had I got home when it began to rain. 2. No sooner had I got home than it began to rain. 我一到家，外面就开始下雨。 五、首先，我们从一个since引导的时间状语从句的例句中，看看since在引导时间状语从句的用法，——Have you known Dr.Jackson for a long time?------Yes,since he jioned the Chinese Society. 在这个例句中，since引导的从句的谓语动词可语从句呢，其实，我们只要看到几个关键词就可以了，也就是用表示时间的连词连接一个句子作状语以是延续性的动词，又可以是瞬时动词。一般情况下，从句谓语动词用一般过去时，而主句的谓语动词用现在完成时。例如： I have made great progress since I was ill. 我自病愈以来取得了很大的进步。 值得注意的是：在It is +时间+since从句的句型中，主句多用一般现在时。例如:1. Where have you been since I last saw you? 自上次我和你见面以后，你到哪里去了? 2. It is four years since my sister lived in Beijing. 我妹妹不在北京住有四年了。 另外，since前有ever，或从句谓语动词是be且后接表示人成长过程中的某个阶段或年龄的名词、形容词时，仍然按字面意思理解。例如： I have lived here ever since I was a child. 我从还是个孩子时就一直住在这儿。

学习不能只于纸上谈兵，如果不会应用，那么掌握再多的理论知识都没用，小编这次就为大家带来不少比较状语从句的题目，快来练语从句练手吧！全部都是填空题哦！ 1. I haven't heard from him _____ he went to America.   2. He won't be here _____ he is invited. 3. He will not go to the cinema _____ he is very busy.   4. We found the key _____ she had left it. 5. We found the books two days ____ he had gone away.   6. We had no sooner got to the station _____ the train left.   7. He speaks English ______ he were an Englishman.   8. He is explaining clearly _______ they could understand.   9. Do not leave the room _____ you have finished the test.   10. She sang ______ she went along. 11. You will succeed in the interview _________ you have confidence. 12. Much ______ I admire David as a poet, I don’t like him as a man. 13. Don’t promise anything ________ you are one hundred percent sure. 14. In time of serious accidents, ______ we know some basic things about first aid, we can save lives. 15. The doctor advised me to live ________ the air is fresh. 16. Guo Jingming had to stand on the table ______ ______ he could be seen by his fans. 17. He had made a mistake, but then he corrected the situation ______ ______ it got worse. 18. He had made a mistake, but then he corrected the situation ______ ______ ______ the worse consequence.   Result clause 19. Pop music is such an important part of society ________ it has even influenced our language. 20. His plan was ________ a good one that we all agreed to accept it. key：1. since  2. unless  3. because  4. where  5. after  6. than  7. as if  8. so that   9. before  10. as long as        16. in order that 17. in case 18. in case of 19 that 20 such 以上就是这次为大家带来的真题了，希望能给大家提供有用的帮助呢！一起加油吧！

      定语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句的某个名语从句是由关系代词或关系副词引导的从句，其作用是作定语修饰主句词性成分，相当于形容词，所以又称为形容词性从句，一般紧跟在它所修饰的先行词后面。 （1）When television was first introduced, the extent to which it could affect human society could not have been foreseen.        人们发明电视的时候，并没能预见到它会对人类社会产生多大的影响。 （2）As is so often pointed out, knowledge is a two-edged weapon which can be used equally for good or evil.        正如人们常常指出的，知识是一把双刃剑，既可以用于造福，也同样可以用来为害。        定语从句按照关系代词的不同，会有不同的情况。

名词性从句，顾名思义就是具有名词作用的从句。因为它在句中可以作主语、宾语、表语和同位语，所以又分为：主语从句，宾语从句，表语从句和同位语从句四种。那么你知道名词性从句的三要素吗？一起和小编来看一下吧！ 1. 语序 名词性从句都必须与陈述句语序相同，即“主语＋谓语”。事实上，任何一种从句，其语序都必须与陈述句的语序相同。 2. 引导词 也从句，顾名思义就是具有名词作用的从句。因为它在句中可以作主语、宾语、表语和同位语，所以又分为：主语就是引导名词性从句的关联词。这些引导词可分为三类,一是that类，二是if / whether类，三是疑问词类。既然是引导词，所以这些词就总是位于名词性从句的最前面。 3. 时态 若主句的谓语动词是一般现在时时，宾语从句的谓语动词可根据情况使用各种时态；若主句的谓语动词是一般过去时，宾语从句若不是一个客观事实或真理，其谓语动词也必须用某种过去时态。 英语初学者往往记不住甚至混淆不清。其实，只要我们把它们进行归类、对比，就发现名词性从句有规律可循，不过最基本的还是要掌握扎实，所以同学们看完这篇文章一定要记住名词性从句的三要素哦！

其中的the reason去掉则与“That is why...”结构一样， 例如： That is (the reason) why I cannot agree. 这就是我不能同意的理由。 2. “That is because...”句型中从属连词because引导的名词性从句在此作表语， 这从句在be等系动词后作表语时被称为表语从句也是个常用句型， 意为“这就是为什么……/因为……”。“That is because...”与“That is why...”之间的不同在于“That is because...”指原因或理由， “That is why...”则指由于各种原因所造成的后果， 例如： 1）He did not see the film last night.